Archive for the ‘Ticks’ Category

Lyme Disease Has the Potential to Emerge in a Wider Range of Habitats Than Previously Thought

https://medicalxpress.com/news/2021-03-lyme-disease-potential-emerge-wider

Lyme disease has the potential to emerge in a wider range of habitats than previously thought

March 21, 2021

scotland
Lyme disease has the potential to emerge in a wider range of habitats than previously thought, suggests University of Liverpool and University of Glasgow research.

A new study, published in Emerging Infectious Diseases found that open, treeless habitats can support similar densities of infected ticks as woodland in the UK, challenging established knowledge of which habitats present the most risk.

Lyme disease—an infection contracted from the bite of an infected – is growing in incidence in people in the UK and large parts of Europe and North America. It is usually associated with forested habitats but over the past decade has, somewhat surprisingly, emerged on treeless islands in the Western Isles of Scotland.

Researchers from the Universities of Liverpool and Glasgow, in collaboration with NHS Western Isles and NatureScot, examined the different human and environmental factors which could have contributed to the rise of Lyme disease in the Western Isles.

Co-lead researcher Dr. Caroline Millins, a research fellow at the University of Liverpool, said: “Superficially, the habitats and the climate of these islands look very similar, yet the incidence of Lyme disease on some islands is 40 times higher than the national average for Scotland, while other nearby islands are relatively less affected. This is really intriguing from an ecological and public health perspective so we wanted to try and understand what could be causing this difference.”

For the study, the researchers sampled ticks from different habitats on islands with high Lyme disease incidence and on islands with low incidence to determine tick numbers and infection rates. None of these islands had any forests. They also analyzed survey responses from 522 local adult residents to understand the social and behavioral factors that influence when and where people are exposed to tick bites.

The proportion of infected ticks was found to be around 6% on islands with high numbers of Lyme disease cases, compared to less than 1% on islands with low numbers of cases.

On islands with a high incidence of Lyme disease, the researchers found that open habitats, including grassland and domestic gardens, had similar tick density and prevalence of infected ticks as forested mainland sites in Scotland.

Co-lead researcher Dr. Roman Biek, from the University of Glasgow, said: “This is a striking finding and suggests that microclimatic conditions in these open habitats, possibly driven by the milder oceanic climate on the Western Isles, can be as conducive to tick survival as conditions in woodlands.

“Our study highlights the potential for Lyme disease to emerge in habitats with a suitable climate other than forests so we should be looking at non-forested habitats more broadly both in the UK and globally.”

The survey results found that residents on islands with a high incidence of Lyme disease were more likely to be bitten by ticks, with most people being bitten close to their home or in their gardens. Residents also reported increasing problems with ticks, with many suggesting increasing numbers of deer, and deer coming closer to people’s homes, as a potential driver.

“When we visited the and attended community meetings, there were significant concerns raised by residents about frequent tick bites in their gardens.”

Dr. Millins said: “Our surveys support residents’ concerns and show that spillover of infected ticks into people’s gardens is very common. These findings can suggest ways we might be able to reduce exposure risk, for example by managing garden environments to reduce tick numbers. We have also started to investigate how deer move across the landscape and how that might affect where ticks are found.”

NatureScot’s Outer Hebrides Operations Manager Johanne Ferguson said: “This important piece of research confirms what many in the Uist community have been reporting for some time—that infected ticks are being found much closer to home. The Lyme Disease Research project is carrying out ongoing research into this, which will inform NatureScot’s work with the Uist community, the Uist Deer Management Group and others to find ways to reduce the tick burden in and around villages.”

Isabell MacInnes, a public health nurse specialist with NHS Western Isles said: “We are aware of the increasing numbers of cases of Lyme disease being reported in people living in the Western Isles, and we welcome the evidence provided through this research, which we will use to guide future public health actions.”


More information: Caroline Millins et al. Emergence of Lyme Disease on Treeless Islands, Scotland, United Kingdom, Emerging Infectious Diseases (2021). DOI: 10.3201/eid2702.203862
Journal information: Emerging Infectious Diseases

1st Report of Deer Ticks Parasitizing a North American Porcupine in Canada

https://www.mdpi.com/2673-6772/1/2/6/htm

First Report of Ixodes scapularis Ticks Parasitizing a North American Porcupine in Canada

by John D. Scott
 
 
Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
Academic Editor: Theo De Waal
Parasitologia 2021, 1(2), 45-49; https://doi.org/10.3390/parasitologia1020006
Received: 16 February 2021 / Revised: 18 March 2021 / Accepted: 25 March 2021 / Published: 1 April 2021

Abstract

Adult females of the blacklegged tick, Ixodes scapularis (Acari: Ixodidae), were collected from a North American porcupine, Erethizon dorsatum, in eastern Ontario, Canada. This porcupine parasitism indicates that an established population of I. scapularis is present in the local vicinity. This tick species is known to parasitize more than 150 different vertebrate hosts, including the North American porcupine. The presence of I. scapularis ticks parasitizing a North American porcupine constitutes a new tick-host record in Canada.

1. Introduction

The North American porcupine, Erethizon dorsatum (Rodentia: Erethizontidae), also known as the Canadian porcupine, is a herbivore rodent. This meso-mammal is one of the largest members in the rodent family, and has wide distribution across continental North America. This woodland denizen is native to coniferous and mixed forests across southern Canada, and its distribution extends southward into northeastern, north-central, and western United States as far south as the northern fringe of Mexico. Ecologically, free-ranging porcupines have a home range of up to 28 ha. This arboreal herbivore is covered with a coat of quills that arm it from predators. Once a porcupine is threatened, it will hide its face, swat its tail at its assailant, and thrust an arsenal of quills in multiple directions to strike its attacker. The sharp, needle-like quills are painful, and prudent attackers retreat. In the spring and summer, porcupines feed on berries, seeds, grasses, leaves, roots, and stems. In the winter, North American porcupines feed on the inner bark of trees. As these herbivore rodents forage for food, they make direct contact with low-lying vegetation where ticks are questing.
Blacklegged ticks, Ixodes scapularis (Acari: Ixodidae), are indigenous across North America east of the Rocky Mountains [1]. Ixodidae, commonly referred to as hard ticks, are predominantly blood-feeding ectoparasites of mammals and birds although several species feed on reptiles [1]. Tiny ticks maintain a stealth presence in the natural environment, and covertly parasitize North American porcupines. These quill-laden rodents are primarily nocturnal, but will defend themselves at any time of day. In Wisconsin, wildlife rehabilitators collected I. scapularis adults from several North American porcupines [2].
 
The locality where the free-ranging porcupine was found is in the Great Lakes-St. Lawrence forest region which consists primarily of red pine, eastern white pine, eastern hemlock, yellow birch, sugar maple, and red oak [3]. In a tick-host study conducted across Ontario with veterinarians, wildlife rehabilitators, and the public, acarologists previously detected I. scapularis ticks on domestic dogs, cats, and humans in the same precambrian area (Canadian Shield) [4]. Although porcupines have feeding activities in trees, these spiny rodents will have direct contact with low-lying vegetation when they are feeding at ground level. If present, this is where I. scapularis ticks are questing. Depending on the time of year and their developmental life stage, I. scapularis ticks conduct host-seeking activities anytime through the day. Several blacklegged ticks collected within a single collection period (a single year) indicate that a reproducing population of I. scapularisis present [5,6].

2. Results

The North American porcupine was found on the side of the road north of Westport, Ontario on County Road 10 (44.687° N, 76.385° W), which is situated within the Canadian Shield (Figure 1). The injured porcupine was taken to Sandy Pines Wildlife Centre, Napanee, Ontario, and a wildlife rehabilitator examined it. Since the head had visible trauma, it is believed that the porcupine was struck by a passing vehicle. Based on a x-ray, veterinary technicians also found a diaphramatic hernia. Due to the severity of trauma, the North American porcupine was promptly euthanized upon arrival, and five partially engorged I. scapularisfemales were collected.

3. Discussion

The collection of five engorged I. scapularis females feeding on a North American porcupine is a novel discovery in Canada (Figure 2). Based on a literature search [2,7,8,9] and the Canadian National Collection, the author affirms that this mammalian parasitism is the first documentation of I. scapularis parasitizing a North American porcupine in Canada. (See link for full article)

NPMA Emphasizes Tick Prevention Amidst New CDC Lyme Disease Estimates

https://pestworldmag.npmapestworld.org/2021/02/01/npma-emphasizes-tick-prevention-amidst-new-cdc-lyme-disease-estimates/

NPMA Emphasizes Tick Prevention Amidst New CDC Lyme Disease Estimates

The National Pest Management Association shares everything the public should know to guard against the serious tickborne disease

According to new research released by the Centers for Disease Control and Prevention (CDC), human cases of tickborne Lyme disease are more common in the U.S. than previously thought. Based on insurance records from 2010 to 2018, the CDC estimates that approximately 476,000 people were diagnosed with and treated for Lyme disease each year in the U.S., representing a staggering 44 percent increase compared to the previous annual estimate of about 329,000 people from 2005 to 2010. In the wake of this alarming uptick, the National Pest Management Association (NPMA) is reminding the public about the serious health threats posed by ticks and the safety precautions people should practice when spending time outdoors.

“Blacklegged ticks, also known as deer ticks, are predominantly found in the Northeast region of the U.S.; however, human cases of Lyme disease, transmitted through the bite of infected blacklegged ticks, have been detected in all 50 states,” said Cindy Mannes, senior vice president of public affairs for the NPMA. “Proper tick prevention is crucial to our health and wellbeing, especially now as outdoor excursions like hikes have become the preferred socially-distanced activities amidst the ongoing pandemic.”

Although Lyme disease is treatable, it can easily be confused for other conditions and cases of the disease are vastly underreported. The CDC receives about 30,000 to 40,000 reported cases each year, much less than the 476,000 annual cases estimated in the agency’s recent report. Knowing the telltale signs of Lyme disease, such as a “bull’s-eye” rash that can appear in some cases, is essential to early detection and receiving proper care. However, the disease can present flu-like symptoms similar to those caused by the common cold or even COVID-19, so anyone experiencing these issues should alert their medical provider and be sure to note if they’ve recently been bitten by a tick.

“Lyme disease can cause a number of different symptoms, from fever and headaches to heart palpitations and brain inflammation,” explained Dr. Jorge Parada, M.D., M.P.H., F.A.C.P., F.I.D.S.A., F.S.H.E.A., medical advisor for the National Pest Management Association. “In addition to aiding in Lyme disease diagnosis, regular tick checks can actually help prevent disease transmission in the first place. Lyme disease can be transmitted into a person’s bloodstream in as little as 36-48 hours after the initial tick bite, making prompt detection and proper tick removal key to disease prevention.”

While peak tick season typically takes place during the warmer months, these pests can still pose serious threats even when the weather outside is cold. According to the CDC’s National Syndromic Surveillance Program, emergency department visits for tick bites typically experience a secondary spike during October and November. To stay safe and tick-free, follow these year-round prevention methods:

  • Wear long-sleeved shirts, long pants and closed-toed shoes
  • Wear insect repellent containing at least 20 percent DEET when outdoors
  • Inspect yourself, your family and pets for ticks after spending time outdoors

Wild animals such as deer can bring ticks onto personal property, where they can detach and hide amongst overgrown grass and vegetation. Regularly remove weeds and cut grass low to keep your yard tick-free, and contact a licensed pest control professional if you suspect or discover a tick infestation.

For more information about tick prevention and tickborne diseases, visit www.PestWorld.org.

https://pestworldmag.npmapestworld.org/2021/03/16/ppma-calls-for-industry-participation-during-inaugural-tick-awareness-week/

PPMA Calls for Industry Participation During Inaugural Tick Awareness Week

Pest control companies urged to help spread consumer awareness of the dangers associated with ticksIn recognition of its inaugural Tick Awareness Week

PPMA will also be unveiling an exciting new consumer campaign: TickTalk. The campaign will kick off during Tick Awareness Week with a comprehensive digital and media relations plan as well as a new microsite complete with never-before-seen photos and videos! PPMA also created an exclusive toolkit available for Mainframe subscribers to download on PPMAMainframe.org. The toolkit includes a customizable press release, suggested social media content, “Tick Talk” logos to be used as website badges, high-resolution photography and video content, and more.

About the National Pest Management Association 

The NPMA, a non-profit organization with more than 5,500 members, was established in 1933 to support the pest management industry’s commitment to the protection of public health, food and property from the diseases and dangers of pests. For more information, visit PestWorld.org or follow @PestWorld on Facebook, Twitter, Pinterest and YouTube.

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**Comment**

Ticks are already active.

Also, there are cases where transmission occurred much faster than the often quoted 36-48 hours, and minimum time has never been established.  

Speaking of transmission, ticks aren’t the only thing you must be concerned with (although authorities want to squash this intel like a June Bug): 

More on prevention:

Take Steps Now To Protect You & Your Family From Tick Bites

https://www.lymedisease.org/protect-tick-bite-alexis-chesney/

Take steps now to protect you and your family from tick bites

New Study Predicts Changing Lyme Disease Habitat Across the West Coast

https://www.eurekalert.org/pub_releases/2021-03/ttgr-nsp031621.php

NEWS RELEASE 

New study predicts changing Lyme disease habitat across the West Coast

Army of ‘citizen scientists’ collect more than 18,000 tick samples for analysis in study funded by Bay Area Lyme Foundation

THE TRANSLATIONAL GENOMICS RESEARCH INSTITUTE

FLAGSTAFF, Ariz. — March 16, 2021 — The findings of a recent analysis conducted by the Translational Genomics Research Institute (TGen), an affiliate of City of Hope, suggest that ecosystems suitable for harboring ticks that carry debilitating Lyme disease could be more widespread than previously thought in California, Oregon and Washington.

Bolstering the research were the efforts of an army of “citizen scientists” who collected and submitted 18,881 ticks over nearly three years through the Free Tick Testing Program created by the Bay Area Lyme Foundation, which funded the research, producing a wealth of data for scientists to analyze.

This new study builds on initial research led by the late Nate Nieto, Ph.D., at Northern Arizona University, and Daniel Salkeld, Ph.D., of Colorado State University.

This immense sample collection represented a multi-fold increase in the number of ticks that could be gathered by professional biologists conducting field surveys in far less time and at a fraction of the cost. This kind of citizen participation — which in the future could include smart-phone apps and photography — could become “a powerful tool” for tracking other animal- and insect-borne infectious diseases important for monitoring human and environmental health, according to study results published in the scientific journal PLOS ONE.

This study expands on previous work in California and is the first study to produce high resolution distributions of both actual and potential tick habitat in Oregon and Washington.

“This study is a great example of how citizen scientists can help — whether tracking climate change, fires, habitat changes or species distribution shifts — at a much finer scale than ever before,” said Tanner Porter, Ph.D., a TGen Research Associate and lead author of the study.

Specifically, Dr. Porter said the findings of this study could help raise awareness among physicians across the West, and throughout the nation, that tick-borne diseases are possible throughout a wider expanse than ever thought before.

Lyme disease is caused by a bacteria, Borrelia burgdorferi (sensu lato), which is carried by ticks, and in this study specifically, the western black-legged tick known as Ixodes pacificus. These ticks also carry pathogens associated with relapsing fever and anaplasmosis, which like Lyme disease can cause fever, headache, chills and muscle aches. Some patients with Lyme disease may experience a rash that may look like a red oval or bull’s-eye.

If not treated promptly, Lyme disease can progress to a debilitating stage, becoming difficult and sometimes impossible to cure. This may include inflammation of the heart and brain.

Lyme disease is the most common tickborne illness in the U.S., annually causing an estimated 500,000 infections, according to the CDC. However, even the most commonly-used diagnostic test for Lyme disease misses up to 70% of early stage cases. There is no treatment that works for all patients.

“We hope this study data encourages residents of California, Oregon and Washington to take precautions against ticks in the outdoors, and helps to ensure that local healthcare professionals will consider diagnoses of Lyme when patients present with symptoms,” said Linda Giampa, Executive Director of the Bay Area Lyme Foundation.

Citizen scientists were encouraged to mail in ticks collected off individuals’ bodies, pets and clothing. They noted the time and place where the ticks were discovered, and described activities involved, the surrounding environment, and in many cases specific GPS coordinates.

Field studies could take decades to produce the same amount of data, said Dr. Porter, adding, “this citizen science technique could allow for real-time distribution monitoring of ticks and other relevant species, an important consideration with emerging pathogens, changing land-use patterns, and climate change.”

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This study builds on TGen’s “One Health Collaborative,” an initiative that uses a holistic approach to monitor the health of humans, animals and the environment, according to David Engelthaler, Ph.D., head of TGen’s infectious disease studies.

The study — Predicting the current and future distribution of the western black-legged tick, Ixodes pacificus, across the Western US using citizen science collections — was published Jan. 5 In PLOS ONE.

About TGen, an affiliate of City of Hope

Translational Genomics Research Institute (TGen) is a Phoenix, Arizona-based nonprofit organization dedicated to conducting groundbreaking research with life-changing results. TGen is affiliated with City of Hope, a world-renowned independent research and treatment center for cancer, diabetes and other life-threatening diseases: CityofHope.org. This precision medicine affiliation enables both institutes to complement each other in research and patient care, with City of Hope providing a significant clinical setting to advance scientific discoveries made by TGen. TGen is focused on helping patients with neurological disorders, cancer, diabetes and infectious diseases through cutting-edge translational research (the process of rapidly moving research toward patient benefit). TGen physicians and scientists work to unravel the genetic components of both common and complex rare diseases in adults and children. Working with collaborators in the scientific and medical communities worldwide, TGen makes a substantial contribution to help our patients through efficiency and effectiveness of the translational process. For more information, visit: tgen.org. Follow TGen on Facebook, LinkedIn and Twitter @TGen.

Media Contact:

Steve Yozwiak
TGen Senior Science Writer
602-343-8704
syozwiak@tgen.org

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For more: 

Wisconsin’s citizen research effort:  The Tick App